Can I use more tire pressure?

[Orion]

I want to go to 15" LR D tires.

The current tires are at 50 psi and the GY Marathons would be at 65 psi.

I have looked all over the wheels and can't find anything about a max PSI for the wheel. How can I know if I am good?

[davel1971]

any brand info on wheel you can research?

[MillerTime]

I think OC has those tires on his trailer which I thought was a Rockwood or flagstaff. He is always saying to put load range D on , so It is working fine for him.

And sometimes wheels have specs on the backside of the spokes

Ps. The 50 -65psi jump isn't quite like a 44psi-80 jump, im sure it will be fine.

MillerTime- Future Sabre Handler!!

[Orion]

I have tried with no success.
Forest Rivers components list and manufacturers did not uncover anything either.

I took one wheel off to get any information off I could find. Nothing really useful, at least through Google yet. The trailer came with LR C Trail Express tires.

This is what I do know. Stamped on wheels -
Max 2150 LBS
SR WHEELS
SR0048 (or 4B?)
15X6 J L
DOT-T
Made in CHINA (Arg!)

[Batts-toy]

My old rims didn't show air pressure either but did show max load which was so close to my TT weight I replaced them along with the tires and went to the Maxxis 'E' tires.

[Airdale]

Originally Posted by Orion

I have tried with no success.
Forest Rivers components list and manufacturers did not uncover anything either.

I took one wheel off to get any information off I could find. Nothing really useful, at least through Google yet. The trailer came with LR C Trail Express tires.

This is what I do know. Stamped on wheels -
Max 2150 LBS
SR WHEELS
SR0048 (or 4B?)
15X6 J L
DOT-T
Made in CHINA (Arg!)

That is a 50 psi rim.

Airdale

[Mark S]

So what happens if you exceed the rim PSI? If a rim is rated at say 65 psi and you go to 80 psi. Will the rim explode or have a catastrophic failure? Is the aluminum rim weaker that a rubber tire?

I replaced "C" rated 50 psi tires on a rim I am told was 65 psi rated with Maxxis "E" rated 80 psi tires. Can 15 or 20 psi really damage or cause a failure ?

[f5moab]

Originally Posted by Airdale

That is a 50 psi rim.

Airdale

Is that based on the actual rim or the load rating?

[Airdale]

Originally Posted by f5moab

Is that based on the actual rim or the load rating?

The load rating.

Retailers - such as Tredit - that provide tires and rims to the RV trailer manufactures often fit their tire & rim assemblies very close in load capacity. Plus sized replacement tires more often than not will also require rim upgrading. Here is a reference to ponder.

Modular

Airdale

[f5moab]

I understand that when equipping tires and rims it is usually to rate them close together.

However, you cannot use the load rating of a rim to determine its max pressure.

Load rating has nothing to do with the max pressure of a rim as it does with a tire.

For example, the HI-Spec rims I have on my trailer have a load rating of 2150 lbs, but a max pressure rating of 80 psi. And that pressure rating was stamped on the back of the rim.
15x6 Series06 Aluminum Hi Spec Trailer Wheel 5 Lug, 2150 lb Max Load Free Shipping.

A steel rim I purchased at the same time for a spare, has a load rating of 2600 lbs but a max pressure of 60 psi.
15x6 White Spoke Trailer Wheel 5 Lug, 2600 lb Max Load

And the Dexstar steel rims that came on my trailer from the dealer, had a load rating of 2040 lbs and a max pressure of 65.

[Airdale]

The DOT does not require specifications for rims to be displayed on the rim. The Society of Automotive Engineers (SAE) are the overseers of rim specifications. The DOT does require rim manufacturers to identify themselves on all rims they manufacturer and certify for highway service. If an owner cannot get the specs from the retailer the next stop is to ask the rim manufacturer. The rim manufacturer, model, size and serial number information will be on the rim.

Airdale

[f5moab]

Yea...so?
Still does not answer my original question, but honestly, I don't care. I'll click off notifications.

[Road-King]

When I had my Windjammer, I went from load "C" to "D" tires. I had the same question as the OP. I contacted LionsHead the supplier of my rims. They told me that my rims were rated for 50 psi, but if I went to a metal valve stem, I could go up to 80 psi. The rubber valve stems was the reason for the 50 psi limit. I had the fancy 15" aluminum rims.

[Ford Idaho]

Originally Posted by Road-King

When I had my Windjammer, I went from load "C" to "D" tires. I had the same question as the OP. I contacted LionsHead the supplier of my rims. They told me that my rims were rated for 50 psi, but if I went to a metal valve stem, I could go up to 80 psi. The rubber valve stems was the reason for the 50 psi limit. I had the fancy 15" aluminum rims.

I Have a set of four 17X8" steel wheels with 265 70's mounted and air to 65 PSI with rubber valve stems.

My question is will this be a problem when I get them warm-hot?

[Orion]

I appreciate all the responses but can't help think I still don't have a clear answer. Since the manufacturer of the wheels isn't obvious I may just need to contact forest river.

[Herk7769]

I did the same as you. If you have the steel rims they will work great at 65 PSI. There is a load rating for the steel wheel stamped on the inside. As long as you don't exceed that weight on the wheel you will be fine.